College- Cell Transport and Cell Membrane

Protein pumps actively transport ions across a cell’s plasma membrane. What molecule directly supplies the energy required for this transport?

• A. ATP
• B. cholesterol
• C. oxygen
• D. tRNA

Molecules in water or in the air will always 'spread out' - like when you drop color in water, or release perfume from a bottle. Which of the statements about this process is FALSE? THERE IS ONLY ONE CORRECT ANSWER!

• this process is called diffusion
• this happens because molecules are always moving
• the molecules will eventually reach equilibrium, where they are equally spread though the container.
• when this happens, molecules are moving with the concentration gradient (from high concentration to low concentration)
• this process requires ATP energy to make happen

Which is the TRUE statement?

• Molecules in A and B are both going with the concentration gradient (from high to low)
• Molecules in A and B are both going against the concentration gradient (from low to high)
• Molecules in A are going with the gradient, while molecules in B are going against
• Molecules in B are going with the gradient, while molecules in A are going against

What type of transport is A?

• active transport
• simple diffusion
• protein pump
• facilitated diffusion

Chose the FALSE statement: When molecules are going WITH the concentration gradient...

• they are moving by passive transport
• they may be going right through the membrane
• they may be going through protein tunnels
• ATP is needed to make this happen

Which of the following would let you know that Active Transport was being done by a cell?

• molecules are moving across the membrane from high concentration to low concentration
• ATP molecules are being used up near the cell membrane
• molecules are moving through protein carriers in the cell membrane
• molecules are moving very quickly across the membrane

Choose the FALSE statement: When molecules are going AGAINST the concentration gradient...

• the cell must use ATP
• the cell is using Active Transport
• molecules are going from high to low concentration
• molecules are being pumped across the membrane

This is an example of..

• protein pump
• facilitated diffusion
• simple difussion
• active transport

This is an example of..

• protein pump
• facilitated diffusion
• simple difussion
• passive transport

Sometimes, viruses dock to the outside of a cell, and induce the cell to surround it with its membrane to take it inside. This is an example of...

• exocytosis
• endocytosis
• diffusion
• protein pump